A flag: informs a certain condition has occured

#include <stdio.h>

       
int main() {
    int temp;
    float celsius;
    char repeat;
    
    do {
        printf("Input a temperature:");
        scanf("%d", &temp);
        
        celsius = (5.0 / 9.0) * ( temp - 32 );
        
        printf("%d degrees F = %6.2f degrees celsius\n", temp, celsius);
        
        printf("Continue (y or Y)?");
        
        repeat = getchar();
        
        putchar('\n');
    } while(repeat == 'Y' || repeat=='y');
}

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A flag: informs a certain condition has occured : Do While « Language Basics « C / ANSI-C

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