Question

How to find last occurrence of a character in a string in C

Answer 1

#include <stdio.h>
   
int last_occurrences(char s[], char ch) {
    int i  = 0, last = -1;
    while(s[i]) {
        if(s[i] == ch) {
            last = i;
        }
        i++;
    }
    return (last == -1) ? -1 : last;
}
   
int main() {
    char s[] = "c c++ c# java php python cobol";
       
    printf("%d\n", last_occurrences(s, 'c'));
    printf("%d\n", last_occurrences(s, 'p'));
    printf("%d\n", last_occurrences(s, 'x'));
       
    return 0;
}
    
    
         
/*
run:
      
25
18
-1
   
*/

 

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