Using pointer, write a C program that reads a character string and a character as input and deletes

#include <stdio.h>
#include<string.h>
void update(char *s, char c){
    int i,len,j,flag;
    flag = 0;
    len = strlen(s);
    for(i=0;i<len;i++){
        if(s[i] == c){
            flag++;
            for(j = i; j < len; j++)
            {
                s[j] = s[j + 1];
            }
            len--;
            i--;
        }

    }
    if (flag > 0){printf("%s",s);}
    else{
        printf("No match");
    }

}
int main() {
    char s[20];
    char c;
    int len,pc;
    gets(s);
    scanf("\n%c",&c);
    update(s,c);
}