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#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 ); }
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