例5.3

int main() { int i,sum=0; printf("please enter i,i=?"); scanf("%d",&i); while(i<=10) {sum=sum+i; i++; } printf("sum=%dn",sum); return 0; } 123456789101112

int main() { int i,sum=0; printf("please enter i,i=?"); scanf("%d",&i); do {sum=sum+i; i++; }while(i<=10); printf("sum=%dn",sum); return 0; } 1234567891011