50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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double factorial(double i) {
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if(i <= 1) {
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return 1;
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}
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return i * factorial(i - 1);
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}
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double power(double a, double b) {
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double result = a;
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for(int i=0;i<b;i++){
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result*=a;
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}
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return result;
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}
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int main(int argc, char **argv){
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// inputs
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uint32_t a, b;
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char op;
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while(1) {
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printf("\nPlease input the first number.\n");
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fflush(stdin);
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scanf("%d", &a);
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printf("Please input the second number.\n");
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fflush(stdin);
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scanf("%d", &b);
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printf("Please select an operation. ( + - * / ^ ! ), e to exit.\n");
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fflush(stdin);
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scanf(" %c", &op); //The %c conversion specifier won't automatically skip any leading whitespace
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// calculate stuff.
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switch(op) {
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case '+': printf("%d + %d = %d\n", a, b, a+b); break;
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case '-': printf("%d - %d = %d\n", a, b, a-b); break;
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case '*': printf("%d * %d = %d\n", a, b, a*b); break;
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case '/': printf("%d / %d = %f\n", a, b, (double)a/(double)b); break;
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case '^': printf("%d^%d = %f\n", a, b, power((double)a,(double)b)); break;
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case '!': printf("%d! = %f\n", a, factorial((double)a)); break;
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case 'e': printf("exiting...\n"); return 0;
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//case '%': printf("%d % %d = %d\n", a, b, a%b); break; // idk weird outputs.
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default: printf("no operation recognized.\n"); return 1;
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}
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}
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}
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