n+nn+nnn+...+n...=n...

#include <stdio.h>
int main()
{
int input;
int i = 0,j;
int num;
int result = 0;
int n;

 printf("请输入：");
 scanf("%d",&n);

for(j = 1;j<=n;j++)
{
input = j;
num = input;
for(i = 0; i < input; i++)
{
printf("%d", num);
result+=num;
num = num*10+input;
if(i+1 < input)
{
printf("+");
}
}
printf("=%d\n",result);
}

return 0;
}