[C++知识库]C语言第二天

#include<stdio.h>

int main()

{

int a = 10;

int b = 5;

int sum ;

sum=a+b;

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

return 0;

}

结果15

#include<stdio.h>;

int main()

{

int a = 10;

int b = 5;

int sum;

sum=a+b;

sum=100;

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

return 0;

}

结果100

sum做变量位置影响结果