[Solved] Insert a character at a specific position in a char array

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This will shift chars to the right, making room for insertion.

void rshift( char *s ){
    int n = strlen( s);
    s[ n + 1] = 0;
    while( n ){
       s[ n ] = s[ n-1 ];
       n--;
    } 
}

int main(){

    char *p = strchr(sentence , replace);

    if( p ) {
         p++; // insert after 
         rshift( p );
         *p = insertingChar;
    }
}

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solved Insert a character at a specific position in a char array