66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
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#include <stdio.h>
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#include "gm.h"
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void getdec(char *,DEC *);
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void main(void);
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void main()
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{
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int choice, opt, nper=0, diy=365;
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DECP pv, intr, intamt;
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DEC *p;
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printf("Simple interest computation\n");
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printf("Variable to solve for --\n");
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printf(" 1) Number of days\n 2) Interest rate\n");
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printf(" 3) Principal\n 4) Accrued interest\n");
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printf("Your choice: ");
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scanf("%d", &choice);
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if (choice == 1)
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opt = GM_N;
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if (choice == 2)
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opt = GM_I;
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if (choice == 3)
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opt = GM_PV;
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if (choice == 4)
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opt = GM_INTR;
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if (opt != GM_N) {
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printf("Number of days: ");
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scanf("%d", &nper);
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}
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if (opt != GM_I)
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getdec("Percentage annual interest rate: ", intr);
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if (opt != GM_PV)
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getdec("Principal: ", pv);
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if (opt != GM_INTR)
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getdec("Accrued interest: ", intamt);
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dprintf("Number of days in year (360 or 365): ");
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dscanf("%d", &diy);
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if (diy == 360)
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p = simp360(&nper, intr, pv, intamt, opt);
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else
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p = simp365(&nper, intr, pv, intamt, opt);
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if (opt==GM_N)
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dprintf("The result is %d\n",nper);
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else {
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if (p)
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dprintf("The result is %v\n",p);
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else
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dprintf("Simple interest failed\n");
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}
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}
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void getdec(str, x)
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char *str;
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DEC *x;
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{
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int i;
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do {
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printf("%s", str);
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i = dscanf("%t", x);
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} while (i<1);
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}
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