#include <stdio.h> int main() { int n,sum=0; //sum不用初始化也正確; do{ //不肯定循環次數,選用do-whlie循環; scanf("%d",&n); if(n<=0){ //do-whlie內部經常須要break,且須要前置; break; } if(n%2!=0){ sum+=n; } }while(n>0); //括號內,只要邏輯1,成立的,能讓程序運行起來的,就正確,填寫不爲0整數均可; printf("%d\n",sum); return 0; }