add really crappy text editor

.gitignore

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+main

Makefile

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+
+main: main.c
+	gcc -o main main.c

main.c

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+#include <stdio.h>
+#include <string.h>
+
+void edit_line(char *buffer, int current_line) {
+	for (int i = 0; i < current_line; i++) {
+		buffer = strchr(buffer, '\n') + 1;
+	}
+
+	char *line_end = strchr(buffer, '\n');
+	char saved[1024] = {0};
+	strcpy(saved, line_end);
+	scanf("%s", buffer);
+	strcpy(buffer + strlen(buffer), saved);
+}
+
+int main(int argc, char **argv) {
+	char buffer[1024] = { 0 };
+
+	FILE *f = fopen(argv[1], "r");
+	fread(buffer, sizeof(buffer), 1, f);
+	fclose(f);
+
+	printf("Contents:\n%s\n", buffer);
+
+	int current_line = 0;
+	scanf("%d", &current_line);
+	edit_line(buffer, current_line);
+
+	f = fopen(argv[1], "w");
+	fwrite(buffer, strlen(buffer), 1, f);
+	fclose(f);
+
+	return 0;
+}