Casts

A cast asks C to treat a value as another type for a specific expression.

casts.c

#include <stdio.h>

int main(void) {
    int total = ;
    int count = 2;
    double average = (double)total / count;

    printf("average=%.1f\n", average);
    return 0;
}

#include <stdio.h>

int main(void) {
    int total = ;
    int count = 2;
    double average = (double)total / count;

    printf("average=%.1f\n", average);
    return 0;
}

#include <stdio.h>

int main(void) {
    int total = ;
    int count = 2;
    double average = (double)total / count;

    printf("average=%.1f\n", average);
    return 0;
}

cast `(double)total` converts `total` before the division runs.

integer division Without a cast, dividing two integers keeps only the integer part.