error C2065:'a' :undeclared identifier#includeint main(){int print_shang();int print_xia();print_shang();print_xia();return 0;}int print_shang(){int a,b;for(a=1;a
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![error C2065:'a' :undeclared identifier#includeint main(){int print_shang();int print_xia();print_shang();print_xia();return 0;}int print_shang(){int a,b;for(a=1;a](/uploads/image/z/15247297-1-7.jpg?t=error+C2065%3A%27a%27+%3Aundeclared+identifier%23includeint+main%28%29%7Bint+print_shang%28%29%3Bint+print_xia%28%29%3Bprint_shang%28%29%3Bprint_xia%28%29%3Breturn+0%3B%7Dint+print_shang%28%29%7Bint+a%2Cb%3Bfor%28a%3D1%3Ba)
error C2065:'a' :undeclared identifier#includeint main(){int print_shang();int print_xia();print_shang();print_xia();return 0;}int print_shang(){int a,b;for(a=1;a
error C2065:'a' :undeclared identifier
#include
int main()
{int print_shang();
int print_xia();
print_shang();
print_xia();
return 0;
}
int print_shang()
{int a,b;
for(a=1;a
error C2065:'a' :undeclared identifier#includeint main(){int print_shang();int print_xia();print_shang();print_xia();return 0;}int print_shang(){int a,b;for(a=1;a
程序错误.你把两个函数放在main前面,并且把返回类型改为void.而且,在print_xia函数中,使用了变量a没有经过定义,所以错误for(j=1;j