Why the output is not correct in this C program?

Question

#include <stdio.h>
#include <stdlib.h>
#include<string.h>
//program to print the repetation of character in a string
//string
int main()
{
char str[20];
char c;

printf("Enter string\t");
gets(str);
int i;
int length,flag=0;
printf("\nEnter character to know its repetation\t");
scanf(" %c",&c);
length=strlen(str);
for(i=0;i<length;i++)
{
if(str[i]== c);
{
flag++;
}
}

printf("\n %c REPEAT %d times ",c,flag);
return 0;
}

Answer 1

You have semicolon after if statement, which causes the if statement useless.

Answer 2

Ohh thanks