#include<stdio.h>
main()
{
printf("HELLO\n");
printf("HELLO\n");
}

#include<stdio.h>
main()
{
float r;
float L;
float S;
float PI;

PI=3.14;

r=5;

L=2*r*PI;
S=PI*r*r;

printf("ENSHUU=%f MENSEKI=%f\n",L,S);
}

#include<stdio.h>
main()
{
float a;
float b;

int wa;
int sa;
int seki;
int shou;
float fshou;

a=255;
b=16;

wa=a+b;
sa=a-b;
seki=a*b;
shou = a/b;
fshou =a/b;

printf("wa=%d sa=%d seki=%d shou=%d\n",wa,sa,seki,shou);
printf("fshou=%f\n",fshou);
}

#include<stdio.h>
main()
{
float a,b,c,sum,ave;

printf("Input a\n");
scanf("%f",&a);

printf("Input b\n");
scanf("%f",&b);

printf("Input c\n");
scanf("%f",&c);

sum=a+b+c;
ave=sum/3;

printf("sum=%f ave=%f\n",sum,ave);

}

#include<stdio.h>
main()
{
float x;
printf("input X\n");
scanf("%d",&x);
printf("int %d float %f\n",x,x);
}

s03q2.cについては答えが，おかしな値になる．
そのため，入力を促す時はprintf("Input x (int)\n");
というように型をしていする方がよい．

#include<stdio.h>
main()
{
float x,y,ans;

printf("Input tate\n");
scanf("%f",&x);

printf("Input yoko\n");
scanf("%f",&y);

ans=x*y;

printf("%f\n",ans);

}

#include<stdio.h>
main()
{
float r,pi,l,s;

printf("Input hankei\n");
scanf("%f",&r);

pi=3.14;

l=2*pi*r;
s=pi*r*r;

printf("enshuu %f imennseki %f\n",l,s);

}

#include<stdio.h>
main()
{
float a,b,c,d,e,sum,ave;

printf("Input Number\n");
scanf("%f",&a);

printf("Input Number\n");
scanf("%f",&b);

printf("Input Number\n");
scanf("%f",&c);

printf("Input Number\n");
scanf("%f",&d);

printf("Input Number\n");
scanf("%f",&e);

sum=a+b+c+d+e;
ave=sum/5;

printf("sum %f ave %f\n",sum,ave);
}

#include<stdio.h>

main()
{
int heisei,seireki;

printf("Input heisei\n");
scanf("%d",&heisei);

seireki=2005-17+heisei;
printf("seireki=%d\n",seireki);
}

#include<stdio.h>
main()
{
int x;

printf("intput number(int) \n");
scanf("%d",&x);

if(x==5) {
printf("FIVE\n");
}

if(x<5) {
printf("Small\n");
}

if(x>5) {
printf("Big\n");
}

}

#include<stdio.h>
main()
{
int x;

printf("Input number\n");

scanf("%d",&x);

if(x >= 0) {
printf("Natural Number\n");
} else {
printf("Integer Number\n");
}

}

#include<stdio.h>
main()
{
int x,y;

printf("Input x\n");
scanf("%d",&x);

printf("Input y\n");
scanf("%d",&y);

if( (x==3) || (y ==5 ) ) {
printf("OK\n");
} else {
printf("NOT\n");
}

}

#include<stdio.h>
main()
{
int x,y;

printf("Input x\n");
scanf("%d",&x);

printf("Input y\n");
scanf("%d",&y);

if( (x==3) && (y ==5 ) ) {
printf("OK\n");
} else {
printf("NOT\n");
}

}

#include<stdio.h>
main()
{
int i;
for(i=0;i<10;i++) {
printf("TAHARA\n");
}
}

#include<stdio.h>
main()
{
int i,sum;

sum=0;

for(i=1;i<=10;i++) {
sum=sum+i;
}

printf("%d\n",sum);

}

#include<stdio.h>
main()
{
int i;
float x,sum,ave;
sum=0;
for(i=0;i<10;i++) {
printf("Input X\n");
scanf("%f",&x);
sum=sum+x;
}

ave=sum/10;

printf("%f %f\n",sum,ave);
}

#include<stdio.h>
main()
{
int ch;
ch = 99;;

while(ch > 5) {
printf("In LOOP\n");
printf("Input ch\n");
scanf("%d",&ch);
}

printf("OUT LOOP\n");

}

#include<stdio.h>
main()
{
int ch;
int a,b,c;
a=b=c=1;
ch = a+b+c;

while(ch < 20) {
printf("In LOOP\n");

printf("Input a\n");
scanf("%d",&a);

printf("Input b\n");
scanf("%d",&b);

printf("Input c\n");
scanf("%d",&c);

ch=a+b+c;
printf("%d\n",ch);
}

printf("OUT LOOP\n");

}

#include<stdio.h>
main()
{
int i,j,k;

for(i=0;i<10;i++) {
for(j=0;j<10;j++) {
for(k=0;k<10;k++) {
if( (i==j) && (j == k) ) {
printf("ATARI %d %d %d\n",i,j,k);
}
}
}
}
}

#include<stdio.h>
main()
{
int x;
x=99;

while( (x%2)!=0 ) {
while( (x%17) != 0 ) {
while( (x%5) != 0) {
printf("input x\n");
scanf("%d",&x);
}
}
}

printf("In LOOP \n");
}

#include<stdio.h>
int my_sum(int a, int b, int c, int d)
{
int ans=a+b+c+d;
return ans;
}

main()
{
int z;
z=my_sum(1,2,3,4);
printf("%d\n",z);
}

#include<stdio.h>
float my_sum(float a, float b, float c, float d)
{
float ans=a+b+c+d;
ans=ans/4.0;
return ans;
}

main()
{
float z;
z=my_sum(1,2,3,4);
printf("%f\n",z);
}

#include<stdio.h>
int my_pow(int a,int b)
{
int sum=1;
int i;
for(i=0;i<b;i++) {
sum=sum*a;
}
return sum;
}

main()
{
int ans;
ans=my_pow(2,3);
printf("%d\n",ans);
}

#include<stdio.h>

void print_name(int n)
{
int i;

for(i=0;i<n;i++) {
printf("TAHARA\n");
}
}

main()
{
print_name(100);
}

（●s11q2.c)
#include<stdio.h>
#include"s11q2.h"
main()
{
print_name(100);
}

(●s11q2.h)
void print_name(int n)
{
int i;

for(i=0;i<n;i++) {
printf("TAHARA\n");
}
}

（●s11q3.c)
#include<stdio.h>
#include"s11q3.h"

main()
{
int ans;

ans=my_sum(100);

printf("%d\n",ans);
}

（●s11q3.h)
int my_sum(int num)
{
int sum = 0;
int i;
for(i=1;i<=num;i++) {
sum=sum+i;
}

return sum;

}

#include<stdio.h>
#include<math.h>

float deg2rad(float deg)
{
float pi=3.14;
float ans;

ans=deg*pi/180.0;

return ans;
}

main()
{
float x,y;

x= 90.0;
y=deg2rad(x);
printf("%f %f\n",sin(y),cos(y));
}

#include<stdio.h>
#include<math.h>

float deg2rad(float deg)
{
float pi=3.14;
float ans;

ans=deg*pi/180.0;

return ans;
}

main()
{
float x,y;
float rad;
float ans;

int i;
for(i=0;i<=360;i++){
rad=deg2rad(x);
x=sin(rad);
y=cos(rad);

ans=x*x+y*y;

printf("%d %f\n",i,ans);
}

}

STEP14を参考にしてください．

#include<stdio.h>
#include<math.h>
int main()
{
float a,b,c,ans1,ans2;
float D;
float ans;
printf("cal root of ax^2 + bx + c = 0\n");
printf("input a\n");
scanf("%f",&a);
printf("input b\n");
scanf("%f",&b);
printf("input c\n");
scanf("%f",&c);

if(a==0) {
printf("a is 0. can not calc\n");
printf("system exit\n");
return -1;
exit(0);
} else {
D=b*b-4*a*c;
if(D>0) {
D=sqrt(D);
ans1=(-b+D)/(2*a);
ans2=(-b-D)/(2*a);
printf("jisuukai\n");
printf("ans1=%f\n",ans1);
printf("ans2=%f\n",ans2);
}
if(D==0) {
ans1=-b/(2*a);
printf("juukai\n");
printf("ans1=%f\n",ans1);
}
if(D<0) {
D=-1*D;
D=sqrt(D);
D=D/(2*a);
ans=-b/(2*a);
printf("kyosuukai\n");
printf("ans1=%f + i* %f\n",ans,D);
printf("ans2=%f - i* %f\n",ans,D);
}
}
return 1;
}

/* 51ページsample12.c を変更した例 */
#include <stdio.h>
#include <math.h>

int main()
{
float rad, x, y;
float pi = 3.14;
int i;
FILE *fp;
fp = fopen("kekka.dat", "w");
if (fp == NULL) {
printf("Can't open kekka.dat");
exit(1);
}
for (i = 0; i <= 360; i++) {
rad = (pi * i / 180.0);
x = sin(rad);
y = cos(rad);
fprintf(fp, "%d %f %f %f\n", i, rad, x, y);
}
fclose(fp);
return 0;
}

#include <stdio.h>
#include <math.h>

int main()
{
float t, y;
FILE *fp;
fp = fopen("kekka.dat", "w");
if (fp == NULL) {
printf("Can't open kekka.dat!");
exit(1);
}
for (t = 0.0; t < 1.0; t += 0.01) {
y = t * t - 2* t + 1;
fprintf(fp, "%f\t%f\n", t, y);
}
fclose(fp);
return 0;
}

私のバイオリズムではグラフより計算した日から２８日前がもっともよい値を示しています．

#include<stdio.h>
main()
{
int data[100];
int i;
int sum = 0;

for(i=0;i<100;i++) {
data[i]=i+1;
}

for(i=0;i<100;i++) {
sum=sum+data[i];
}

printf("%d\n",sum);
}

#include<stdio.h>
#include<math.h>

main()
{
float data[360];
int i;
float sum = 0;

for(i=0;i<360;i++) {
data[i]=sin(i*3.14/180.0);;
}

for(i=0;i<360;i++) {
sum=sum+data[i];
}

printf("%f\n",sum);
}

#include<stdio.h>
main()
{
int DATA[10][10][10];
int i,j,k;
int x,y,z;
int ans;

for(i=1;i<=9;i++) {
for(j=1;j<=9;j++) {
for(k=1;k<=9;k++) {
DATA[i][j][k]=i*j*k;
}
}
}


printf("input Number\n");
scanf("%d",&x);

printf("input Number\n");
scanf("%d",&y);

printf("input Number\n");
scanf("%d",&z);

ans=DATA[x][y][z];
printf("%d * %d * %d = %d\n",x,y,z,ans);
}

#include<stdio.h>

main()
{
float a[2][2];
float b[2][2];
float ans[2][2];
int i,j;

a[0][0]=1;
a[0][1]=0;
a[1][0]=0;
a[1][1]=1;

b[0][0]=1;
b[0][1]=2;
b[1][0]=3;
b[1][1]=4;

for(i=0;i<2;i++) {
for(j=0;i<2;j++) {
ans[i][j]=a[i][j]+b[i][j];
}
}

printf("%f %f\n%f %f\n",ans[0][0],ans[0][1],ans[1][0],ans[1][1]);
}

#include <stdio.h>

int main()
{
int year, month;
int yc, mc;
int week;
int i, j;
int day;
int last[12] = {31, 28, 31, 30,
31, 30, 31, 31,
30, 31, 30, 31};
int lastday;
int cal[6][7];
printf("ﾇｯ､??ﾎﾏ､ｷ､ﾆｲｼ､ｵ､､: ");
scanf("%d", &year);
for (month = 1; month <= 12; month++) {
yc = year;
mc = month;
if (month == 1 || month == 2) {
yc--;
mc += 12;
}
week = ((yc+(yc/4)-(yc/100)
+(yc/400)+(13*mc+8)/5)+1) % 7;
day = 1 - week;
for (i = 0; i < 6; i++) {
for (j = 0; j < 7; j++) {
cal[i][j] = day++;
}
}
lastday = last[month - 1];
if (month == 2) {
if (year % 400 == 0 ||
(year % 4 == 0 && year % 100 != 0)) {
lastday = 29;
}
}
printf("\t%dﾇｯ%dｷ?n", year, month);
printf("｡｡ﾆ?｡ｷ?｡ｲﾐ｡｡ｿ蝪｡ﾌﾚ｡｡ｶ筍｡ﾅﾚ\n");
for (i = 0; i < 6; i++) {
for (j = 0; j < 7; j++) {
if (cal[i][j] > 0 &&
cal[i][j] <= lastday) {
printf("%4d", cal[i][j]);
} else {
printf(" ");
}
}
printf("\n");
}
}
return 0;
}

#include <stdio.h>

int main()
{
int year, month;
int yc, mc;
int week;
int i, j;
int day;
int last[12] = {31, 28, 31, 30,
31, 30, 31, 31,
30, 31, 30, 31};
int lastday;
int cal[6][7];
FILE *fp;
fp = fopen("calendar.txt", "w");
if (fp == NULL) {
printf("Can't open calendar.txt!\n");
exit(1);
}
printf("ﾇｯ､??ﾎﾏ､ｷ､ﾆｲｼ､ｵ､､: ");
scanf("%d", &year);
printf("ｷ???ﾎﾏ､ｷ､ﾆｲｼ､ｵ､､: ");
scanf("%d", &month);
yc = year;
mc = month;
if (month == 1 || month == 2) {
yc--;
mc += 12;
}
week = ((yc+(yc/4)-(yc/100)
+(yc/400)+(13*mc+8)/5)+1) % 7;
day = 1 - week;
for (i = 0; i < 6; i++) {
for (j = 0; j < 7; j++) {
cal[i][j] = day++;
}
}
lastday = last[month - 1];
if (month == 2) {
if (year % 400 == 0 ||
(year % 4 == 0 && year % 100 != 0)) {
lastday = 29;
}
}
fprintf(fp, "｡｡ﾆ?｡ｷ?｡ｲﾐ｡｡ｿ蝪｡ﾌﾚ｡｡ｶ筍｡ﾅﾚ\n");
for (i = 0; i < 6; i++) {
for (j = 0; j < 7; j++) {
if (cal[i][j] > 0 &&
cal[i][j] <= lastday) {
fprintf(fp, "%4d", cal[i][j]);
} else {
fprintf(fp, " ");
}
}
fprintf(fp, "\n");
}
return 0;
}

int find_max( int DATA[] , int n)
{
int i,max;

max=DATA[0];

for(i=0;i<n;i++) {
if(max <= DATA[i]) {
max=DATA[i];
}
}
return max;
}

int find_min( int DATA[] , int n)
{
int i,min;

min=DATA[0];

for(i=0;i<n;i++) {
if(min >= DATA[i]) {
min=DATA[i];
}
}
return min;
}


main()
{
int mydata[10] = { 99, 48, 40, -100, 60, 100, 20, -19 ,46, 100 };

int ans1,ans2;

ans1= find_max(mydata,10);
ans2= find_min(mydata,10);
printf("%d %d\n",ans1,ans2);
}

#include<stdio.h>
#include<math.h>
int niji_houteishiki(float a,float b,float c,float kai[2][2])
{
float ans1,ans2;
float D;
float ans;

if(a==0) {
printf("a is 0. can not calc\n");
printf("system exit\n");
return -1;
exit(0);
} else {
D=b*b-4*a*c;

if(D>0) {
D=sqrt(D);
ans1=(-b+D)/(2*a);
ans2=(-b-D)/(2*a);
kai[0][0]=ans1;
kai[1][0]=ans2;
return 1;
}

if(D==0) {
ans1=-b/(2*a);
kai[0][0]=ans1;
return 2;
}

if(D<0) {
D=-1*D;
D=sqrt(D);
D=D/(2*a);
ans=-b/(2*a);
kai[0][0]=ans;
kai[1][0]=ans;

kai[0][1]=D;
kai[1][1]=-D;
return 3;
}
}

}


main()
{
float ans[2][2];
int mode;

mode=niji_houteishiki(1,2,1,ans);
printf("%d\n",mode);
printf(" %f %f\n %f %f\n",ans[0][0],ans[0][1],ans[1][0],ans[1][1]);
}

#include<stdio.h>
main()
{
int *x;
int *y;

int a;
int b;
int ans;

a=5;
b=6;

x=&a;
y=&1;

ans= *x + *y;

printf("%d\n",ans);
}

#include<stdio.h>
main()
{
int *x;
int *y;

int a;
int b;
int ans;

a=5;
b=1;

x=&a;
y=&b;

ans=(*x)*(*y);

printf("%d\n",ans);
}

#include<stdio.h>
main()
{
float *pa;
float x;

x=100.0;

pa=&x;

printf("%p %f\n",pa,*pa);

}

#include<stdio.h>
main()
{
float *pa;
float data[5] = { 0.0, 0.1 , 0.2 , 0.3, 0.4 };
int i;

pa=data;

for(i=0;i<5;i++) {
printf("%d %p %f\n",i,pa+i,*(pa+i));
}
}

void find_max_min( int DATA[] , int n , int *Max, int *Min)
{
int i,max,min;

max=DATA[0];

for(i=0;i<n;i++) {
if(max <= DATA[i]) {
max=DATA[i];
}
}

min=DATA[0];

for(i=0;i<n;i++) {
if(min >= DATA[i]) {
min=DATA[i];
}
}
*Max = max;
*Min = min;
}


main()
{
int mydata[10] = { 99, 48, 40, -100, 60, 100, 20, -19 ,46, 100 };

int max,min;

find_max_min(mydata,10,&max,&min);
printf("%d %d\n",max,min);
}

#include<stdio.h>
#include<math.h>
void find_ave_hensa( float DATA[] , int n , float *ave ,float *hensa)
{
int i;
float sum=0;
float diff;


for(i=0;i<n;i++) {
sum=DATA[i]+sum;
}

*ave=sum/n;

sum=0;
for(i=0;i<n;i++) {
diff=DATA[i]-(*ave);
sum=sum + diff*diff;
}
*hensa=sqrt(sum/(n-1));
}


main()
{
float mydata[10] = { 99, 48, 40, -100, 60, 100, 20, -19 ,46, 100 };

float ave,hensa;

find_ave_hensa(mydata,10,&ave,&hensa);
printf("%f %fd\n",ave,hensa);
}

#include <stdio.h>
typedef struct {
float shinchou;
float taijuu;
float bmi;
} bmi;

int main()
{
bmi my;
printf("ｿﾈﾄｹ(cm)､??ﾎﾏ､ｷ､ﾆ､ｯ､ﾀ､ｵ､､: ");
scanf("%f", &my.shinchou);
my.shinchou /= 100;
printf("ﾂﾎｽﾅ(kg)､??ﾎﾏ､ｷ､ﾆ､ｯ､ﾀ､ｵ､､: ");
scanf("%f", &my.taijuu);
my.bmi = my.taijuu / (my.shinchou * my.shinchou);
printf("ｿﾈﾄｹ = %f(m), ﾂﾎｽﾅ = %f(kg), BMI = %f\n",
my.shinchou, my.taijuu, my.bmi);
return 0;
}

#include <stdio.h>

int main()
{
char c = ' ';
int i, j;
printf("--0123456789ABCDEF\n");
for (i = 2; i <= 7; i++) {
printf("%1d:", i);
for (j = 0; j < 16; j++) {
printf("%c", c++);
}
printf("\n");
}
return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct {
char name[50];
char zip[9];
char address[200];
char tel[15];
char birthday[15];
} address;

char *wordcpy(char *dst, char *src);

int main()
{
address data[100];
char line[500];
char *next;
FILE *fp;
int i;
int num = 0;
fp = fopen("address.dat", "r");
if (fp == NULL) {
printf("Can't open address.dat\n");
exit(1);
}
while (fgets(line, 500, fp) != NULL) {
line[ strlen(line) - 1 ] = '\0';
if (strcmp(line, "end") == 0)
break;
next = wordcpy(data[num].name, line);
next = wordcpy(data[num].zip, next);
next = wordcpy(data[num].address, next);
next = wordcpy(data[num].tel, next);
next = wordcpy(data[num].birthday, next);
num++;
}
for (i = 0; i < num; i++) {
printf("〒%s\n%s\n%s 様\nTel: %s, 誕生日: %s\n",
data[i].zip, data[i].address,
data[i].name, data[i].tel, data[i].birthday);
}
}
char *wordcpy(char *dst, char *src)
{
while (*src != '\t' && *src != '\0') {
*dst++ = *src++;
}
*dst++ = '\0';
if (*src == '\t') {
src ++;
}
return src;
}

#include <stdio.h>
#include <math.h>
#define N 1000
int main()
{
int flag[N+1];
int i, j;
int x;
int first = 1;
for (i = 1; i <=N; i++) {
flag[i] = 1;
}
flag[1] = 0;
for (i = 2; i <= sqrt(N); i++) {
if (flag[i] == 1) {
for (j = i*2; j <= N; j += i) {
flag[j] = 0;
}
}
}
do {
printf("%d までの整数を入れてください\n", N);
scanf("%d", &x);
} while (x > N);
printf("整数%dは", x);
i = 2;
while (x != 1) {
if (flag[i] == 1 && (x % i) == 0) {
if (first != 1) {
printf("×");
}
first = 0;
printf("%d", i);
x /= i;
} else {
i++;
}
}
printf("\n");
return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define N 512

int main()
{
int y, x, d;
FILE *fp;
fp = fopen("circle.pgm", "w");
if (fp == NULL) {
printf("Can't open circle.pgm!");
exit(1);
}
fprintf(fp, "P2\n%d %d\n255\n", N, N);
for (y = -N/2; y < N/2; y++) {
for (x = -N/2; x < N/2; x++) {
if (x*x + y*y <= 40000) {
d = 255;
} else {
d = 0;
}
fprintf(fp, "%d ", d);
}
fprintf(fp, "\n");
}
fclose(fp);
return 0;
}