#include <stdio.h> // printf()
#include <stdlib.h> // atoi()
#include <ctype.h> // isdigit()
int main(int argc, char *argv[])
{
if( argc != 2 ) {
return 0;
}
char * pWord = argv[ 1 ];
char c = 0;
for( int i = 0; c = pWord[ i ], c ; ++i ) {
if( ! isdigit( c ) ) {
return 0;
}
}
int argvNum = atoi( argv[ 1 ] );
printf( "argc = %d, argv[ 1 ] = %s, argvNum = %d\n",
argc, argv[ 1 ], argvNum );
}