lather.c

#include <stdio.h>

void PrintShampooInstructions(int numCycles) {
 
    if (numCycles < 1) {
        printf("Too few.\n");
        return;
    }
    if (numCycles > 4) {
        printf("Too many.\n");
        return;
    }
    
    for(int i = 1; i <= numCycles; i++) {
        printf("%d: Lather and rinse.\n", i);
    }
    
    printf("Done.\n");
}

int main(void) {
   PrintShampooInstructions(2);

   return 0;
}