charInt.c

#include <stdio.h>

int main() {
    char myChar = 'A';
    int myInt = myChar;
    printf("myChar: %c\n", myChar);
    printf("myInt: %d\n", myInt);

    int myNewInt = 98;
    char myNewChar = myNewInt;
    printf("myNewInt: %d\n", myNewInt);
    printf("myNewChar: %c\n", myNewChar);

    return 0;
}

casting.c

/*
    CSE374 datatype demo by Diana Dai

    Edited by Alex McKinney
*/

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>

int main(){

  int anint;
  float afloat;
  char achar;

  // some initial values:
  printf("Set int to 374, float to 374.473, char to 'A'\n");
  anint = 374;
  afloat = 374.473;
  achar = 'A';  // aka, ascii code 65

  printf("int: %d, float: %f, char: %c\n", anint, afloat, achar);
  printf("\n");

  printf("Cast to int.\n");
  printf("int: %d, float: %d, char: %d\n", anint, (int)afloat, (int)achar);
  printf("\n");

  printf("Cast to float.\n");
  printf("int: %f, float: %f, char: %f\n", (float)anint, afloat, (float)achar);
  printf("\n");

  printf("Change int to 66, float to 66.76\n");
  printf("Cast to char.\n");
  anint=66;
  afloat = 66.76;
  printf("int: %c, float: %c, char: %c\n", (char)anint, (char)afloat, achar);
  printf("\n");

  printf("Change int to 321, float to 321.76 (overflow wraps around)\n");
  printf("Cast to char.\n");
  anint=321;
  afloat = 321.76;
  printf("int: %c, float: %c, char: %c\n", (char)anint, (char)afloat, achar);
  printf("\n");
}

Makefile

CC = gcc
CFLAGS = -g -Wall -std=c11

all: charInt casting

charInt: charInt.c
    $(CC) $(CFLAGS) -o charInt charInt.c

casting: casting.c
    $(CC) $(CFLAGS) -o casting casting.c