int main(void)
{
		char buf[256];
		char bu[256];
		char input[256];
		int i = 0;
		int line = 0,start,lines = 0;
		FILE *jp;
		FILE *eg;
		
		jp = fopen("Japanese.txt","r");
		eg = fopen("English.txt","r");
		
		printf("Type number:");
		scanf("%d",&start);
		
		while(fgets(buf,256,jp) != NULL)
		{
			++line;
			if(line >= start)
			if(line >=start)		
			break;
		}
		
		while(fgets(bu,256,eg) != NULL)
		{
			++lines;
			if(lines >= start)
			if(lines >= start)
			break;
		}
		
		printf("%s",bu);
		printf("Type Key:");
		scanf("%s",input);
		
		i = strcmp(buf,input);
		
		if(i == 0)
		{
			printf("Mission Clear\n");
			main();
		}	else {
			printf("Mission Error\n");
			main();
		}
		
		fclose(jp);
		fclose(eg);
		
		return 0;
}

Segmentation fault