46 lines
967 B
C
46 lines
967 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int is_valid_number(const char *s) {
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char *endptr;
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if (s[0] == '\0' || s[0] == '\n') return 1;
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strtod(s, &endptr);
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while (*endptr == ' ' || *endptr == '\t' || *endptr == '\n') endptr++;
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return *endptr == '\0';
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}
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int main(){
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char line[100];
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double x = 0, a = 0, b = 0, c = 0, y;
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fgets(line, 100, stdin);
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if(!is_valid_number(line)){
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return 0;
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}
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x = strtod(line, NULL);
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fgets(line, 100, stdin);
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if(!is_valid_number(line)){
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return 0;
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}
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a = strtod(line, NULL);
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fgets(line, 100, stdin);
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if(!is_valid_number(line)){
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printf("Nepodarilo sa načítať b");
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return 0;
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}
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b = strtod(line, NULL);
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fgets(line, 100, stdin);
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if(!is_valid_number(line)){
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printf("Nepodarilo sa načítať c");
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return 0;
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}
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c = strtod(line, NULL);
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y = x*x*a+b*x+c;
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printf("Vysledok je: %.2f\n", y);
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return 0;
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} |