Get Parameters with C

Get parameters

• interactive approach:

<source lang="cpp">

1. include "stdio.h"

int main() {

 char * c;
 int i = 0;
 double d = 0.0;

 printf("Enter a word\n");
 scanf("%s",c);
 printf("Enter an integer\n");
 scanf("%d",&i);
 printf("Enter a double\n");
 scanf("%lf",&d);
 printf("You gave : %s %d %lf",c,i,d);
 printf("\n");

 return 0;

} </source>

• from the command line:

<source lang="cpp">

1. include "stdio.h"

int main(int argc, char* argv[]) {

 if(argc != 4)
   {
     printf("\tUsage:\t");
     printf("%s",argv[0]);
     printf(" <char> <integer> <double>\n");
   }
 else
   {
     char * c =  argv[1];
     int i = atoi(argv[2]);
     double d = atof(argv[3]);
     printf("You gave : %s %d %lf",c,i,d);
     printf("\n");
   }
 return 0;

} </source>

• from a file

<source lang="cpp"> </source>