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c:stdlib.h:atol [2013/01/22 22:02] (current)
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 +   
 +    
 +{{keywords>wiki library source code example reference}}
 +====== atol ======
 +<code c>
 +    #include <stdlib.h>
 +     long int atol(const char *str); 
 +</code>    
 +    convert a string to long integer
 +
 +===== C Sourcecode Example =====    
 +<code c>
 +#include <stdio.h> /* including standard library */
 +//#include <windows.h> /* uncomment this for Windows */
 +
 +#include <stdlib.h>
 +
 +int main(void){
 +
 +    char string[]="1234";
 +    long int  i;
 +    
 +printf("string = %s \n", string );
 +printf("int = %li \n", atol(string) );
 +
 +i = atol(string);
 +i = i + i;
 +printf("i + i = %li\n", i);
 +
 +return 0;
 +}
 +
 +</code>
 +
 +==== Output ====
 +
 +    Output:
 +    user@host:~$  ./atol 
 +    string = 1234 
 +    int = 1234 
 +    i + i = 2468
 +
 +
  
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c/stdlib.h/atol.txt · Last modified: 2013/01/22 22:02 (external edit)

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