88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#define LINESIZE 100
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struct kalkulacka{
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float cislo; };
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int main() {
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struct kalkulacka number[LINESIZE];
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memset(number, 0, sizeof(struct kalkulacka) * LINESIZE);
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char line[LINESIZE];
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size_t velkost;
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memset(line, 0, LINESIZE);
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int a = 0;
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int i;
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int input = 0;
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float p;
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float vys;
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while (fgets(line, LINESIZE, stdin)) {
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velkost = strlen(line);
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if (velkost == 1 && line[velkost - 1] == '\n') {
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break;
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}
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if (input >= 10){
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break;
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}
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if (line[0] == '+' || line[0] == '-' || line[0] == '*' || line[0] == '/') {
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input =+ 2;
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if (a == 1){
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printf("not enough operands\n");
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vys = 1;
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break;
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}
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if (line[0] == '+') {
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number[a - 2].cislo = number[a - 2].cislo + number[a - 1].cislo;
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a--;
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}
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if (line[0] == '-') {
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number[a - 2].cislo = number[a - 2].cislo - number[a - 1].cislo;
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a--;
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}
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if (line[0] == '*') {
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number[a - 2].cislo = number[a - 2].cislo * number[a - 1].cislo;
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a--;
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}
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if (line[0] == '/') {
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if (number[a - 1].cislo == 0){
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printf("division by zero");
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vys = 1;
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a = 0;
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}
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else {
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number[a - 2].cislo = number[a - 2].cislo / number[a - 1].cislo;
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a--;
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}
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}
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}
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else {
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if(line[0] >= '0' && line[0] <= '9') {
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p = atof(line);
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number[a].cislo = p;
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a++;
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input++;
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}
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else {
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printf("bad input\n");
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vys = 1;
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break;
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}
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}
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for (i = 0; i < a; i++){
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printf("%.2f ", number[i].cislo);
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}
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printf("\n");
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}
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if (vys != 1) {
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printf("no input\n");
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}
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return 0;
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} |