from a biased fool

Activity – January 12, 2010

#include<stdio.h>

int main() {
    float g1, g2, g3, g4, g5, ave;
    printf("\n\nEnter 5 grades of student: ");
    scanf("%f %f %f %f %f", &g1, &g2, &g3, &g4, &g5);
    if ( (g1 < 0) || (g1 > 100) ||
	 (g2 < 0) || (g2 > 100) ||
	 (g3 < 0) || (g3 > 100) ||
	 (g4 < 0) || (g4 > 100) ||
	 (g5 < 0) || (g5 > 100) )
	    printf("There was an invalid grade input. Average will be out of range.");
    else {
	ave = (g1 + g2 + g3 + g4 + g5) / 5;
	printf("\nThe average was %f%. Rating: ", ave);
	if (ave >= 90)
	    printf("A");
	else if ((ave >= 80) && (ave <= 89))
	    printf("B");
	else if ((ave >= 70) && (ave <= 79))
	    printf("C");
	else if ((ave >= 60) && (ave <= 69))
	    printf("D");
	else
	printf("F");
    }
    getch();
    return 0;
}

and something more complex

#include<stdio.h>

int main() {
    int c = 0;
    float gi = 0, gh = 0, ave = 0;
    printf("\n\nEnter 5 grades of student: ");
    do {
	scanf("%f", &gi);
	if ((gi >= 0) && (gi <= 100)) {
	    gh = gh + gi;
	    c++;
	    if (c == 1)
		printf("%d grade input accepted.", c);
	    else
		printf("%d grade inputs accepted.", c);
	}
	else
	    printf("Invalid grade input. Please input grade again: ");
    }
    while (c < 5);
    ave = gh / 5;
    printf("\nThe average was %f%. Rating: ", ave);
    if (ave > 89)
	printf("A");
    else if ((ave > 79) && (ave < 90))
	printf("B");
    else if ((ave > 69) && (ave < 80))
	printf("C");
    else if ((ave > 59) && (ave < 70))
	printf("D");
    else
	printf("F");
    getch();
    return 0;
}