text: #include <stdio.h>
  
  int main(int argc, const char * argv[]) {
  	FILE *file = fopen(argv[1], "r");
  	char line[1024];
  	int sum = 0;
  
  	while (fgets(line, 1024, file)) {
  		for (char * c = line; *c != NULL && *c != '\n'; c++) {
  			if (*c >= 'A' && *c <= 'Z') {
  				*c = *c + 32;
  			}
  		}
  
  		printf("%s", line);
  	}
  
  	return 0;
  }