字符串查找

#include <stdio.h>
#define N 20

main( int argc, char *argv[] ) {
	int i, j, t;
	char a[N], *p = argv[1];
    
	for ( i = 0; i < N-1; a[i] = t, i++ ) {
		if ( (t=getchar()) == EOF ) {
			break;
		}
        		
	}
	a[i] = 0; //a[i] = '\0';
	    
    //printf("%s\n",p); 
    //printf("%s\n",a); 

	for ( i = 0; a[i] != 0; i++ ) {
		for ( j = 0; p[j] != 0; j ++ ) {
			if ( a[i+j] != p[j] ) {
				break;
			}
		}

		if ( p[j] == 0 ) {
			printf("%d", i);
		}
	}
	printf("\n");
	system("pause"); 
}