Do while loop for your selection

    
#include <stdio.h>

int main(void) {
    char ch;
    
    do {
        printf("Load, Save, Edit, Quit?\n");
        do {
            printf("Enter your selection: ");
            ch = getchar();
        } while(ch!='L' && ch!='S' && ch!='E' && ch!='Q');

        if(ch == 'Q') {
            printf("Exit.");
        }

    } while(ch != 'Q');
    
    return 0;
}

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Do while loop for your selection : Do While « Language Basics « C / ANSI-C

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