In the main function if i simply declare the replacement character like this..
c = '*';
the program will keep looping normal and work normal after user enters y or Y to proceed.
But if i want the user to enter the replacement character and do this..
c = getchar();
after the user enters either y or Y, the loop ends and the program just closes. Why is this?
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define BUFF_SIZE 512
void getRandomStr(char s1[]);
void strreplace(char s1[], char chrs[], char c);
void check(char s2[], char chrs[]);
char cont(void);
int main()
{
char s1[BUFF_SIZE];
char s2[BUFF_SIZE], c;
char proceed = 0;
do {
getRandomStr(s1);
printf("Your random string is: %s\n", s1);
/* gets(s1) */
printf("\nPlease enter up to 20 letters to be replaced: ");
gets(s2);
printf("\nPlease enter a replacement character (Ex. *, $, etc.): ");
c = getchar();
check(s1, s2);
printf("\nModified string after replacement is: ");
strreplace(s1, s2, c);
proceed = cont();
} while (proceed == 'Y' || proceed == 'y');
}
void getRandomStr(char s1[]) {
int i;
srand(time(NULL));
for (i = 0; i < 41; i++) {
char c = rand() % 26 + 'A';
s1[i] = c;
}
s1[41] = '\0';
}
void strreplace(char s1[], char chrs[], char c)
{
int i = 0;
while (chrs[i] != '\0') {
for (int j = 0; s1[j] != '\0'; j++) {
if (s1[j] == chrs[i])
{
s1[j] = c;
}
}
i++;
}
puts(s1);
}
char cont()
{
char proceed;
printf("\nWould you like to run the program again (y/n)? ");
scanf_s("%c%*c", &proceed);
return proceed;
}
void check(char s2[], char chrs[])
{
int i = 0;
while (chrs[i] != '\0') {
for (int j = 0; s2[j] != '\0'; j++) {
if (!(chrs[i] >= 'A' && chrs[i] <= 'Z'))
{
printf("An invalid character was entered.\n");
break;
}
}
i++;
}
}
