c語言中統計正整數的位數

 

1、

#include <stdio.h>

int main(void) { int i,k; do { puts("please input an integer."); printf("i = "); scanf("%d", &i); } while (i <= 0); k = i; int j=0; while (i > 0) { i /= 10; j++; } printf("%d's width is %d",k,j); return 0; }