Question

How to convert string to numbers in C

Answer 1

#include <stdio.h>
#include <stdlib.h>

int main() {
    char s[] = "4981";
    
	long int li = strtol(s, NULL, 10);
	
    printf("%ld\n", li);
	
    return 0;
}	

   
   
   
/*
run:
   
4981
   
*/

 

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Answer 2

#include <stdio.h>
#include <stdlib.h>

int main() {
    char s[] = "3.14";
    
	float f = atof(s);
	
    printf("%f\n", f);
	
    return 0;
}	

   
   
   
/*
run:
   
3.140000

*/

 

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