实验1C语言开发环境使用和数据类型、运算符、表达式

#include<stdio.h>
int main() {
    printf(" 0 \n");
    printf("<H>\n");
    printf("I I\n");

    return 0;
}

 

 

 

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

    int x, y;
    int r1, r2, r3, r4;

    x = 1;
    y = 2;
    r1 = x + y;
    r2 = x - y;
    r3 = x * y;
    r4 = x / y;

    printf("r1 = %d\n", r1);
    printf("r2 = %d\n", r2);
    printf("r3 = %d\n", r3);
    printf("r4 = %d\n", r4);

    return 0;
}

 

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

    float x, y;
    float r1, r2, r3, r4;

    x = 1;
    y = 2;
    r1 = x + y;
    r2 = x - y;
    r3 = x * y;
    r4 = x / y;

    printf("r1 = %f\n", r1);
    printf("r2 = %f\n", r2);
    printf("r3 = %f\n", r3);
    printf("r4 = %f\n", r4);

    return 0;
}

#include<stdio.h>
int main() {
int n, r1, r2, r3, r4;

    n = 100;

    r1 = n * (n + 1) / 2;
    r2 = (n + 1) * n / 2;
    r3 = n / 2 * (n + 1);
    r4 = (n + 1) / 2 * n;

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

    printf("r1 = %d\n", r1);
    printf("r2 = %d\n", r2);
    printf("r3 = %d\n", r3);
    printf("r4 = %d\n", r4);

    return 0;
}

 

#include<stdio.h>
int main() {
int n, r1, r2, r3, r4;

    n = 101;

    r1 = n * (n + 1) / 2;
    r2 = (n + 1) * n / 2;
    r3 = n / 2 * (n + 1);
    r4 = (n + 1) / 2 * n;

    printf("n = %d\n", n);
    printf("r1 = %d\n", r1);
    printf("r2 = %d\n", r2);
    printf("r3 = %d\n", r3);
    printf("r4 = %d\n", r4);

    return 0;
}

 

#include<stdio.h>
int main()
{
double x, y;
char c1,c2,c3;
int a1,a2,a3;

scanf("%d%d%d",&a1,&a2,&a3);
printf("%d,%d,%d\n",a1,a2,a3);
scanf("%c%c%c", &c1,&c2,&c3);
printf("%c,%c,%c\n",c1,c2,c3);
scanf("%lf%lf", &x, &y);
printf("%lf,%lf\n",x,y);

return 0;
}

 

#include<stdio.h>
int main()
{
    double x, y;
    char c1,c2,c3;
    int a1,a2,a3;

    scanf("%d%d%d",&a1,&a2,&a3);
    printf("%d,%d,%d\n",a1,a2,a3);
    scanf("%c%c%c", &c1,&c2,&c3);
    printf("%c,%c,%c\n",c1,c2,c3);
    scanf("%lf%lf", &x, &y);
    printf("%lf,%lf\n",x,y);

    return 0;
}

 

#include<stdio.h>
int main()
{
    double x, y;
    char c1,c2,c3;
    int a1,a2,a3;

    scanf("%d%d%d",&a1,&a2,&a3);
    printf("%d,%d,%d\n",a1,a2,a3);
    scanf("%c%c%c", &c1,&c2,&c3);
    printf("%c,%c,%c\n",c1,c2,c3);
    scanf("%lf%lf", &x, &y);
    printf("%lf,%lf\n",x,y);

    return 0;
}