C：统计整数位数;
#include <stdio.h>
int main(void){
int count=0, num;
scanf("%d",num);
do{
num=num/10;
count++
}
while(num!=0);
printf("%d",count);
return 0;
}
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#include <stdio.h>
int main(void){
int count=0, num;
scanf("%d",num);
do{
num=num/10;
count++
}
while(num!=0);
printf("%d",count);
return 0;
}