number in c
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
int main()
{
int a, b;
float c, d;
scanf("%i %i", &a, &b);
scanf("%f %f", &c, &d);
int sum1 = a + b;
int sum2 = a - b;
float sum3 = c + d;
float sum4 = c - d;
printf("%i %in", sum1, sum2);
printf("%.1f %.1f", sum3, sum4);
return 0;
}how to know a type of a numbe in c
int num;
char term;
if(scanf("%d%c", &num, &term) != 2 || term != 'n')
printf("failuren");
else
printf("valid integer followed by enter keyn");c check if char is number
char c = 'a'; // or whatever
if (isalpha(c)) {
puts("it's a letter");
} else if (isdigit(c)) {
puts("it's a digit");
} else {
puts("something else?");
}Copyright © 2021 Codeinu
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