Lista 7 - Exercício 4

#include <stdio.h>

void menugen(void);
float sum(float val,float val2);
float subtr(float val,float val2);
float multi(float val, float val2);
float divi(float val, float val2);

int main() {

    int option;
    float val,val2,ans;

    menugen();
    scanf("%d",&option);
    printf("Insira os dois valores :\n");
    scanf("%f %f",&val,&val2);

    switch(option) {
        case 1:
            ans = sum(val,val2); break;
        case 2:
            ans = subtr(val,val2); break;
        case 3:
            ans = multi(val,val2); break;
        case 4:
            ans = divi(val,val2); break;
        default:
            printf("Entrada invalida!\n");
    }

    printf("Resposta = %.3f\n",ans);
    return 0;
}

void menugen(void) {
    printf("-----------------------------------\n");
    printf("Escolha uma opcao:\n1 -- somar\n2 -- subtrair\n3 -- multiplicar\n4 -- dividir\n");
    printf("-----------------------------------\n");
}

float sum(float val,float val2) {
    return val+val2;
}

float subtr(float val,float val2) {
    return val-val2;
}

float multi(float val, float val2) {
    return val*val2;
}

float divi(float val, float val2) {
    if (val2 != 0)
        return val/val2;
    else {
        printf("ERROR\n");
        return 0;
    }
}