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C program to replace all occurrence of a character in a string
Enter a string at run time and read a character to replace at console. Then, finally read a new character that has to be placed in place of an old character where ever it occurs inside the string.
Program1
Following is the C program to replace all occurrence of a character −
#include <stdio.h>
#include <string.h>
int main(){
char string[100], ch1, ch2;
int i;
printf("enter a string : ");
gets(string);
printf("enter a character to search : ");
scanf("%c", &ch1);
getchar();
printf("enter a char to replace in place of old : ");
scanf("%c", &ch2);
for(i = 0; i <= strlen(string); i++){
if(string[i] == ch1){
string[i] = ch2;
}
}
printf("
the string after replace of '%c' with '%c' = %s ", ch1, ch2, string);
return 0;
}Output
When the above program is executed, it produces the following result −
enter a string: Tutorials Point enter a character to search: i enter a char to replace in place of old: % the string after replace of 'i' with '%' = Tutor%als Po%nt enter a string: c programming enter a character to search: m enter a char to replace in place of old: $ the string after replace of 'm' with '$' = c progra$$ing
Program2
Following is the C program to replace at first occurrence −
#include <stdio.h>
#include <string.h>
int main(){
char string[100], ch1, ch2;
int i;
printf("enter a string : ");
gets(string);
printf("enter a character to search : ");
scanf("%c", &ch1);
getchar();
printf("enter a char to replace in place of old : ");
scanf("%c", &ch2);
for(i = 0; string[i]!='\0'; i++){
if(string[i] == ch1){
string[i] = ch2;
break;
}
}
printf("
the string after replace of '%c' with '%c' = %s ", ch1, ch2, string);
return 0;
}Output
When the above program is executed, it produces the following result −
Run 1: enter a string: Tutorial Point enter a character to search: o enter a char to replace in place of old: # the string after replace of 'o' with '#' = Tut#rial Point Run 2: enter a string: c programming enter a character to search: g enter a char to replace in place of old: @ the string after replace of 'g' with '@' = c pro@ramming
Updated on: 24-Mar-2021
3K+ Views
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