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The C programming language made simple

Implementing a stack in C

#include <stdio.h> #include <string.h> #include <stdlib.h> int stack[256]; int count = 0; void push(int x) { if (count == 256) { fprintf(stderr, "There's no space in the stack\n"); return; } stack[count] = x; count++; // stack[count++] = x; } int pop() { if (count == 0) { fprintf(stderr, "Nothing to take from stack\n"); return -1; } int res = stack[count - 1]; count--; return res; // return stack[count-- - 1]; } int main(int argc, char* argv[]) { push(1); push(2); push(3); push(5); int i; for (i = 0; i < 5; i++) { printf("%d ", pop()); } return 0; }