Question

How to use String.IndexOfAny function in C

Answer 1

#include <stdio.h>
#include <string.h>

// size_t strcspn(const char *str1, const char *str2)

int IndexOfAny(char* source, char* search) {
    int result = strcspn(source, search);
    
    if (result != strlen(source)) {
        return result;
    }
    
    return -1;
}

int main() {
    char* source = "c c++ java python c#";    
    char* search = "java";
    
    printf("%d\n", IndexOfAny(source, search));
    
    printf("%d\n", IndexOfAny(source, "xy"));
    
    printf("%d\n", IndexOfAny(source, "#"));
    
    printf("%d\n", IndexOfAny(source, "zr"));

    return 0;
}



/*
run:

6
12
19
-1

*/

 

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