202083450045

任务三

#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() {
    while (1)
        printf("0 1");

    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() {

    printf("hello,C\n");

    return 0;
}