Created
October 26, 2018 03:59
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| int resolverNPN(char *str){ | |
| char *eq = strrev(str); | |
| int l = strlen(str); | |
| // temporario que armazena a conversão do caracter para o numero tipo inteiro | |
| int tmp; | |
| // variaveis utiliza para as operações matematicas | |
| int x, y, result; | |
| stack_t *int_stack; | |
| stack_initialize(&int_stack, constructor_int, destructor_int); | |
| for (int i = 0; i < l; i++){ | |
| if(isdigit(eq[i])){ | |
| tmp = eq[i]-'0'; | |
| stack_push(int_stack,&tmp); | |
| } | |
| if(eq[i]=='+'){ | |
| x = *(int*)stack_top(int_stack); | |
| stack_pop(int_stack); | |
| y = *(int*)stack_top(int_stack);; | |
| stack_pop(int_stack); | |
| result = x+y; | |
| stack_push(int_stack,&result); | |
| } | |
| if(eq[i]=='-'){ | |
| x = *(int*)stack_top(int_stack); | |
| stack_pop(int_stack); | |
| y = *(int*)stack_top(int_stack);; | |
| stack_pop(int_stack); | |
| result = x-y; | |
| stack_push(int_stack,&result); | |
| } | |
| if(eq[i]=='*'){ | |
| x = *(int*)stack_top(int_stack); | |
| stack_pop(int_stack); | |
| y = *(int*)stack_top(int_stack);; | |
| stack_pop(int_stack); | |
| result = x*y; | |
| stack_push(int_stack,&result); | |
| } | |
| if(eq[i]=='/'){ | |
| x = *(int*)stack_top(int_stack); | |
| stack_pop(int_stack); | |
| y = *(int*)stack_top(int_stack);; | |
| stack_pop(int_stack); | |
| result = x/y; | |
| stack_push(int_stack,&result); | |
| } | |
| } | |
| return *(int*)stack_top(int_stack); | |
| } |
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