Question

C PROGRAMMIMG

I want to check if my 2 input is a number or not

all of the input are first stored in an array if this the right way?

read = sscanf(file, %s%s%s, name, num, last_name);

if(strcmp(num, "0") != 0)

printf("Invalid. Please enter a number.")

Answer 1

CODE:

#include <stdio.h>

#include <string.h>

int main(void) {

  char name[10];

  char num[10];

  char last_name[10];

  int i;

scanf("%s%s%s", name, num, last_name);

// to check if all the digits in the array are numbers

int numberOfDigits=0;

for(i=0;i<strlen(num);i++){

  // if the number is between 0 and 9

  if(num[i] >= '0' && num[i] <= '9')

    numberOfDigits++;

}

if(numberOfDigits==strlen(num))

  printf("Number\n");

else

  printf("Invalid. Please enter a number.\n");

return 0;

}

OUTPUT:

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