C Cheat Sheet
Main Function
void main(void) {
}
Printf
#include <stdio.h>
void main(void) {
int i = 1;
unsigned u = 2;
long l = 3;
float f = 4.0;
double d = 5.0;
char c = 6;
unsigned char uc = 7;
printf("i = %d, u = %u, l = %l, f = %f, d = %lf, c = %c, c = %d, uc =
%d\n",
i, u, l, f, d, c, c, uc);
printf("print a tab by \t and new line by \n");
}
Scanf
#include <stdio.h>
void main(void) {
int i;
printf("Print a prompt for i\n");
scanf("%d", &i);
}
Conditionals
if(flag) {
// put some statements here to execute if flag is true (flag != 0)
}
if(flag) {
// put some statements here to execute if flag is true (flag != 0)
} else {
// put some statements here to execute if flag is false (flag == 0)
}
switch(flag) {
case 0: // statements
break;
case 1: // statements
break;
case 2: // statements
break;
default: // statements
}
