View Code of Problem 50

    #include <stdio.h>
    int main() {
    	char a[80], b[80];
    	int i, j = 0;
    	gets(a);
    	for (i = 0; i < strlen(a); i++) {
    		if (a[i] >= '0'&&a[i] <= '9') {
    			b[j] = a[i];
    			putchar(b[j]);
    			j++;
    		}
    		else if (b[j - 1] != '*') {
    			b[j] = '*';
    			putchar(b[j]);
    			j++;
    		}
    	}
    	printf("\n");
    	return 0;
    }