可以参考一下
#include<stdio.h>
main(){
int a,b,count=0,shuweisum,num;
scanf("%d%d",&a,&b);
int min=a<b?a:b;
int max=a>b?a:b;
for(int i=min;i<=max;i++){
shuweisum=0;
num=i;
while(num>=10){
shuweisum+=num%10;
num/=10;
}
shuweisum+=num;
if(shuweisum%5==0&&shuweisum!=0)count++;
}
printf("%d",count);
}
main(){
int a,b,count=0,shuweisum,num;
scanf("%d%d",&a,&b);
int min=a<b?a:b;
int max=a>b?a:b;
for(int i=min;i<=max;i++){
shuweisum=0;
num=i;
while(num>=10){
shuweisum+=num%10;
num/=10;
}
shuweisum+=num;
if(shuweisum%5==0&&shuweisum!=0)count++;
}
printf("%d",count);
}
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