#include <stdio.h> int second(int x,int y) int main(){ int a,b,c; scanf("%d,%d\n",&a,&b); c=second(a,b); printf("%d\n",c); return 0;} int second(int x,int y){ int z; z=x+y; return(z);}one error，看看這段代碼哪里錯了