a=1;b=1; //給a,b賦值,這裏a,b自己定
sum=a+b; //求和
printf{"the sum is %d",sum}; //輸出sum的值
return (0);}
求輸入的兩數之和#include <stdio.h>int main (){int a,b,sum;
printf{"Please enter x,y:"}; //提示輸入x,y
scanf{"%d,%d",&a,&b}; //將輸入的值賦給a,b
sum=a+b; //求和
printf{"the sum is %d",sum}; //輸出sum的值
return (0);
}
使用函數求和：
#include <stdio.h>int sum(int x,int y) //定義求和函數{int sum; //申明sum為整數型sum=x+y; //將輸入函數的x,y求和return(sum); //向函數返回sum的值}
int main () //以下為主函數{int a,b,sum;
sum=sum(a,b); //調用求和函數
printf{"the sum is %d",sum}; //輸出sum的值
return (0);
}
望采納，嘿嘿。