函数之粗写的加减乘除

加

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

speak();
return 0;
}
void speak(){
int x;
int y;
scanf("%d", &x);
scanf("%d", &y);
printf("x+y=%d", x + y);
}

 

减

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

speak();
return 0;
}
void speak(){
int x;
int y;
scanf("%d", &x);
scanf("%d", &y);
printf("x-y=%d", x - y);
}

 

乘

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

speak();
return 0;
}
void speak(){
int x;
int y;
scanf("%d", &x);
scanf("%d", &y);
printf("x*y=%d", x * y);
}

 

除

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

speak();
return 0;
}
void speak(){
int x;
int y;
scanf("%d", &x);
scanf("%d", &y);
printf("x*y=%d", x * y);
}