例3.将上题中求和功能用函数sumO完成,在主函数中调用。 int sum(int a, int b) i int s; s=a+b /求和* return (S); main( Int x, y,z, printf( Enter two numbers: n); scanf("%d%od", &x, &y); Esum(x, y) printf(%d+%od=%od", x, y, z;例3. 将上题中求和功能用函数sum()完成，在主函数中调用。 int sum(int a,int b) { int s; s=a+b; /*求和*/ return (s); } main( ) { int x,y,z; printf("Enter two numbers:\n"); scanf("%d%d",&x,&y); z=sum(x,y); printf(“%d+%d=%d”,x,y,z); }