用c语言求解:输入123,输出1+2+3等于6

#include int s=0; void abc(int n) {s+=n%10; if(n>9){abc(n/10); printf("+%d",n%10);} else printf("%d",n); } int main() {int n; scanf("%d",&n); abc(n); printf("=%d",s); return 0; }